<template>
    <div>
          <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
         <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 600px;height:400px;"></div>
    </el-card>
    </div>
</template>

<script>
// 1.导入echarts
import echarts from 'echarts'
import _ from 'lodash'
export default {
    data () {
        return {
            // 需要合并的数据
            options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
        }
    },
    created () {

    },
    // 此时页面上的dom元素已经渲染完毕
   async mounted() {
        // 3.基于准备的dom 初始化echarts实例
         var myChart = echarts.init(document.getElementById('main'));
      const {data: res} = await this.$http.get('reports/type/1')
        if (res.meta.status !== 200) {
            return $message.error('获取折线图失败')
        }
        //  4.准备 数据和配置项
      const result = _.merge(res.data, this.options)

        //5. 展示数据
         myChart.setOption(result);
    },
    methods:{

    }
}
</script>


<style lang="less" scoped>

</style>